Sir James Blake has retired from Scotland Yard so that he can assist his niece Hope and her friend Jerry in developing an apparatus they have invented. Sir James thinks that their invention has the potential to prevent wars, and plans to donate it to the League of Nations. But a gang of criminals led by the elusive "Scorpion" steals the device, and Blake and his associates must recover the invention and determine the identity of the "Scorpion".
as Jerry Sheehan
as Hope Mason
as Doctor Marshall
as Bobby Mason
as Duchess
as Julot
as Chief Insp. Henderson
as Mimi - Policewoman
as The Hag / Baron Polinka
as Daggett - the Butler (as Ted Lorch)
as Pedro - Henchman
as Peyton - Henchman
as Count Basil Segaloff
as Charles - the Footman
as Nicky
